From: Or Gerlitz <ogerlitz@mellanox.com>
Date: Wed, 22 Oct 2014 21:55:49 +0000 (-0700)
Subject: ib_isert: Add max_send_sge=2 minimum for control PDU responses
X-Git-Tag: omap-for-v3.19/fixes-for-merge-window~89^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f57915cfa5b2b14c1cffa2e83c034f55e3f0e70d;p=pandora-kernel.git

ib_isert: Add max_send_sge=2 minimum for control PDU responses

This patch adds a max_send_sge=2 minimum in isert_conn_setup_qp()
to ensure outgoing control PDU responses with tx_desc->num_sge=2
are able to function correctly.

This addresses a bug with RDMA hardware using dev_attr.max_sge=3,
that in the original code with the ConnectX-2 work-around would
result in isert_conn->max_sge=1 being negotiated.

Originally reported by Chris with ocrdma driver.

Reported-by: Chris Moore <Chris.Moore@emulex.com>
Tested-by: Chris Moore <Chris.Moore@emulex.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Cc: <stable@vger.kernel.org> # 3.10+
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
---

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